New clock-feedthrough compensation scheme for switched-current circuits

An improved clock-feedthrough compensation scheme for switched current system is proposed. Both the signal dependent and the constant clock-feedthrough terms are canceled by using both nMOS and pMOS current samplers and by adopting a source replication technique. The proposed current memory cell was fabricated with 0.6 /spl mu/m CMOS process. Both experimental and theoretical results on clock-feedthrough error reveal substantial reduction over the existing compensation schemes.